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A Comparison of the Performance of Homogeneous and Heterogeneous Barley Populations 1
Author(s) -
Clay R. E.,
Allard R. W.
Publication year - 1969
Publication title -
crop science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.76
H-Index - 147
eISSN - 1435-0653
pISSN - 0011-183X
DOI - 10.2135/cropsci1969.0011183x000900040004x
Subject(s) - hordeum vulgare , yield (engineering) , biology , homogeneous , grain yield , agronomy , stability (learning theory) , poaceae , mathematics , materials science , combinatorics , machine learning , computer science , metallurgy
Twenty‐three mixtures of barley ( Hordeum vulgare L.) varieties were compared with their components for yielding ability and for yield stability at five locations in California over 2 years. The mixtures had a small advantage in yield over the average of the varieties but were inferior to their components in stability of yield. The yield advantage of mixtures decreased when environmental heterogeneity was reduced by excluding data from the most extreme location. The number or diversity of components in a mixture appeared unrelated to its yield. Certain F 2 populations, included in the second year, were higher yielding but less stable than their parents. It was concluded that simple varietal mixtures have limited commercial possibilities and that special breeding programs may be necessary if favorable inter‐genotypic interactions are to be utilized.